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Copyright (2016) General Electric Company, U.S.A.
1.PLANNING INFORMATION
A.Effectivity
* * * FOR GEnx-1B64, -1B64/P1, -1B64/P2, -1B67, -1B67/P1, -1B67/P2, -1B70, -1B70/75/P1, -1B70/75/P2, -1B70/P1, -1B70/P2, -1B70C/P1, -1B70C/P2, -1B74/75/P1, -1B74/75/P2
This Service Bulletin is applicable to all GEnx-1B engines.
This Service Bulletin has been introduced in production to these GEnx-1B engines:
•
GEnx-1B engines, serial numbers 956-768, 956-773 and up.
These serial numbers are the best available data.
The current oil level temperature sensor (OLTS) P/N 8TJ146CGC1 is affected by this Service Bulletin.
B.Description
This Service Bulletin introduces a new OLTS P/N 8TJ146CGD1, machine bolt (bolt) P/N MS9557-12, and flat washer (washer) P/N MS9321-10.
C.Compliance
Category 7
GE recommends that you do this Service Bulletin at customer's convenience/option.
NOTE:
This Service Bulletin can be accomplished on wing or in shop.
D.Concurrent Requirements
None.
E.Reason
(1)Objective:
To introduce a new OLTS and attaching parts configuration with the external flange changed from stainless steel to aluminium.
(2)Condition:
The current OLTS has the external flange made of stainless steel. The other parts of the OLTS are aluminium.
(3)Cause:
Stainless steel was originally used to meet fire-proof requirements, but the other parts of the OLTS and the oil tank are made of aluminium with a fire protection blanket covering the assembly. A stainless steel flange is not required to meet the fire-proof requirements.
(4)Improvement:
Changing the old configuration to a slightly thicker aluminium flange simplifies manufacture process and reduces weight.
(5)Substantiation:
Substantiation is by analysis.
F.Approval
The data contained in this Service Bulletin has been reviewed by the appropriate governmental authority and the repair(s) and modification(s) herein comply with the applicable Aviation Regulations and are APPROVED for installation in the model(s) listed in this Service Bulletin.
G.Manpower
No additional man-hours are required to comply with this Service Bulletin.
H.Weight and Balance
The complete compliance with this Service Bulletin decreases weight by 0.49 lb (0.22 kg).
I.References (Use the latest version of these documents)
GEK 112851, GEnx-1B Engine Manual (EM)
GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC)
GEK 114087, GEnx-1B Component Maintenance Manual (CMM), 79-31-41
GEnx-1B, Boeing 787 Aircraft Maintenance Manual (AMM)
NOTE:
The reference documents listed below are for the engine manufacturer's internal use only:
 
CID: 575555
 
BPP: 13-79-00-01
J.Publications Affected
GEK 112851, GEnx-1B Engine Manual (EM)
GEK 112864, GEnx-1B Engine Illustrated Parts Catalog (EIPC)
GEK 114087, GEnx-1B Component Maintenance Manual (CMM), 79-31-41
K.Interchangeability
Qualified interchangeability.
The new and old OLTSs are functionally interchangeable, but the slightly thicker flange on the new OLTS P/N 8TJ146CGD1 must be installed with longer bolt P/N MS9557-12 and washer P/N MS9321-10.
However, the old OLTS can use either the original bolt P/N MS9557-10, or the longer bolt P/N MS9557-12 and washer P/N MS9321-10.
L.Software Accomplishment Summary
Not applicable.
2.MATERIAL INFORMATION
A.Material - Price and Availability
(1)Parts necessary to do this Service Bulletin:
 
Part Number
Qty/ Eng
Part Name
Unit ($) Price
Pkg Qty
Lead Time Days
 
8TJ146CGD1*
(1)
Temperature Sensor, Oil Level
NP
(-)
--
 
MS9321-10**
(3)
Washer, Flat
NP
(-)
--
 
MS9557-12**
(3)
Bolt, Machine
NP
(-)
--
NP = Not Provisioned
NOTE:
Prices are provided for planning purposes and are subject to change.
*Part not supplied by GE Engine Services Distribution L.L.C. To procure parts, contact your Avio Customer Support Manager for spare part information:
GE Avio Aero Vendor CAGE Code A3460
http://www.avioaero.com
OR
e-mail: customerportal@avioaero.com
**Part not supplied by GE Engine Services Distribution L.L.C. Procure through local purchase.
(2)Other Spare Parts:
 
Part Number
Qty/ Eng
Part Name
Unit ($) Price
Pkg Qty
Lead Time Days
 
J1438P139
(1)
Packing, Preformed
20.75
(1)
5
 
J1438P201
(1)
Packing, Preformed
8.50
(1)
5
NOTE:
Prices are provided for planning purposes and are subject to change.
(3)Consumables:
None.
B.Industry Support Information
None.
C.Configuration Chart
 
New Part Number
Qty/ Eng
Part Name
Old Part Number/ IPC Location
Qty/ Eng
Op Code
Chg/ Sprt Code
 
2315M10G04
(X)
Tank, Oil
2315M10G04
(X)
RM
-/-
 
.MS9557-12
01-010A, 79-31-40
(3)
Bolt, Machine
(SIN 4002C)
.MS9557-10
01-010, 79-31-40
(3)
RE
5/E
 
.MS9321-10
01-012, 79-31-40
(3)
Washer, Flat
(SIN 40039)
--
(-)
AD
5/-
 
.8TJ146CGD1
01-020B, 79-31-40
(1)
Temperature Sensor, Oil Level
(SIN 400A3)
.8TJ146CGC1
01-020, 79-31-40
(1)
RE
5/B
Operation Codes
AD=Add
RE=Replace
RM=Remains
Change Codes
5=Qualified interchangeability. Refer to paragraph 1.K., Interchangeability.
Support Codes
B=Old parts will be supplied until all old parts are sold. E=Old parts will be supplied, and can be used at other engine locations.
D.Parts Disposition
None.
E.Tooling - Price and Availability
None.
3.ACCOMPLISHMENT INSTRUCTIONS
A.Removal
(1)Remove the old OLTS (1, Figure 1) and bolts (2) from the oil tank. For on-wing instructions, refer to the GEnx-1B, Boeing 787 AMM, 79-31-01, Removal, TASK DMC-B787-A-G79-31-01-00A-520A-A. For in shop instructions, refer to the GEnx-1B EM, 72-00-01, DISASSEMBLY 001.
B.Installation
(1)Install the new OLTS (1, Figure 1). For on-wing instructions, refer to the GEnx-1B Boeing 787 AMM, 79-31-01, Installation, TASK DMC-B787-A-G79-31-01-00A-720A-A. For in-shop instructions, refer to the GEnx-1B EM, 72-00-01, ASSEMBLY 001, and do as follows:
WARNING:
REFER TO THE PRODUCT LABEL AND THE MANUFACTURERS (MATERIAL) SAFETY DATA SHEET (SDS) FOR INSTRUCTIONS ON THE HAZARDS, STORAGE, SAFE HANDLING AND PROPER USE OF THIS PRODUCT.
(a)Lubricate the threads and friction surfaces of the new bolts (2) with clean engine oil.
(b)Install the new bolts (2) and washers (3) that attach the new OLTS (1) to the oil tank.
(c)Torque the new bolts (2) to 78 to 96 lb in. (8.8 to 10.8 Nm).
OLTS Replacement
Figure 1